Bounties /Pin to ProfileBookmark

1 Answer(s)

possible answer
@JaySODec 06, 2022 — You can use the hasOwnProperty() method. This method returns a boolean value indicating whether the object has the specified property as its own property (as opposed to inheriting it).

Example:


const object = {
key1: "value1",
key2: "value2"
};

if (object.hasOwnProperty("key1")) {
// Do something if the object has the "key1" property
}


You can also use the in operator to check if a specific key exists in an object or array. This operator returns a boolean value indicating whether the specified property exists in the object.

Example:


const array = ["value1", "value2"];

if ("key1" in array) {
// Do something if the array has the "key1" property
}
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